Lighting fixtures



March 19, 1963 COOK 3,082,320

' LIGHTING FIXTURES Filed May 1, 1959 2 Sheets-Sheet 1 2s 2s 23 24 25 I 24 23 24 j Fig. 2

INVENTOR. Albert N. Cook WITNESS BY ATTORNEY March 19, 1963 COOK 3,082,320

LIGHTING FIXTURES Filed May 1, 1959 2 Sheets-Sheet 2 INVENTOR.

Alberf N. Cook WITNESS 5 ATTORNEY 3,082,320 Patented Mar. 19, 1963 3,082,320 LIGHTING FIXTURES Albert N. Cook, Bernardsville, N.J., assignor to The Singer Manufacturing Company, Elizabeth, N.J., a corporation of New Jersey Filed May 1, 1959, Ser. No. 810,435 4 Claims. (Cl. 240-4155) This invention relates to lighting fixtures and more particularly relates to ventilated lighting fixtures for use as attachable units with industrial machines and made of easily-assembled separable elements to facilitate cleaning and servicing.

It is a primary object of this invention to provide a ventilated lighting fixture for mounting on machines in close proximity to the operator and without danger to the operator from physical contact with the fixture.

A further object is to provide a lighting fixture comprising shade, reflector, lens, lamp, lamp socket and switch which may be completely disassembled without special tools for cleaning and servicing.

A still further object of this invention is to provide an insulated lighting fixture having a minimum number of metallic fastening elements and none which are exposed for accidental contact by the operator.

It is a further object to provide an insulated shell of conical form having one end open to provide access to separable lens, reflector, socket and lamp elements secured therewithin, the apex end being formed with a transverse wall having a central aperture for receiving a detachable switch for controlling the lamp.

With the above and other objects in view, as will hereinafter appear, the invention comprises the devices, combinations and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of the invention and the advantages attained thereby, will be readily understood by those skilled in the art.

FIG. 1 is a longitudinal sectional view, partly in elevation, showing a lighting fixture embodying the invention.

FIG. 2 is a vertical sectional View taken on the line L-2 of FIG. 1.

FIG. 3 is a front end elevational view of the device of FIG. 1.

FIG. 4 is an exploded view of the deviceof FIG. 1.

Referring to FIG. 1 a shell or shade element of conical form is made of molded insulation material and is provided with an open end 11 to permit access to elements assembled within the interior thereof. The apex end of the shell 10 is formed with a transverse wall portion 12 having an aperture 13 within which is received a threaded stud 14 of a rotary switch 15 which is secured by a nut 16. A control knob 17 for the switch 15 is made of molded insulation material and is shaped to provide externally a smooth continuation of the surface of the shell or shade element 10. Surface indentations 18 made in the knob 17 provide means to facilitate gripping the knob with the fingers.

A hollow threaded stud 19 secured to the shell 10 by means of a nut 20 provides support for the shell 10 and The tabs 27 are seated against the ends of alternate ones of the stiffening ribs 23 and are secured thereto by means of screws 28 threaded into the tapped holes 24.

The edge portion 26 of the reflector element 25 is formed with spaced slots 29 as seen best in FIG. 4. Bridging portions 30 adjacent to the slots 29 are pushed in radially, as seen best in FIG. 3, and these deformed edge portions form seats for receiving edge-tongue portions 31 of a lens element 32.

Spring fingers 33 secured by the screws 28 seat against an annular groove 34 in the lens element and provide resilient means for urging the edge-tongue portions 31 into the seats formed by the bridging portions 30'. Square washers 35 under the heads of the screws 28 provide increased bearing surface. It will be seen that the lens element 32 may be inserted by pushing it in against the spring fingers 33 and twisting to bring the edge-tongue portions 31 into positions where they are retained against the bridging portions 30 by the fingers 33.

It will be seen that, by this construction, the lens and reflector elements are positioned in radially-spaced relation to the shell 10 and this provides an annular space for the entry and exit of air to and from the shell 10 for ventilating purposes.

A lamp socket 36 is secured to a U-shaped flat spring member 37 having two limbs 38 and 39 formed with reduced hook terminals 40-40 adapted to enter apertures 4141 in a peripheral portion of the reflector element 25. The spring limbs 38 and 39 provide an outwardly directed biasing force which secures the socket 36 to the reflector 25. Detachment of the socket from the reflector is easily accomplished by inward pressure on the limbs 38 and 39 and separation of the elements. A lamp 42 is removably secured within the lamp socket 36.

Leads 43, 44 from the lamp socket 36, the leads 21, 22 and leads 45, 46 from the switch 15 are connected together electrically, as shown in FIG. 1, by means of staked connectors 47 and this completes the assembly.

Reference to the exploded view of FIG. 4 shows the parts in disassembled relation and reveals the simplicity of the assembly and the few fastening elements which are required to effect it.

Having thus set forth the nature of my invention, what I claim herein is:

1. A lighting fixture comprising an insulated shade element, securing means, a reflector secured by said means to said shade element and formed with a peripheral slotted portion, a lens element having portions received in said slotted portion, spring fingers secured by said reflector securing means to said shade and cooperating with said slotted portion to retain said lens element in position relative to said reflector, and a lamp socket formed with spring clips in removable snap-in engagement with and supported by said reflector.

2. A lighting fixture comprising an insulated shade element, securing means, a reflector secured by said means to said shade element and formed with a peripheral slotted portion, a lens element having portions received in said slotted portion, spring fingers secured by said reflector securing means to said shade and cooperating with said slotted portion to retain said lens element in position relative to said reflector, a lamp socket formed with spring clips in removable snap-in engagement with and supported by said reflector, and a switch removably secured to one end of the shade element and having a control knob which forms a smooth continuous contour with the external surface of the shade element.

3. A lighting fixture comprising a cup-like insulated shade element, securing means, a reflector nested within and secured by said means to said shade element, a lens element, portions of the periphery of said reflector being deformed and engaged by the lens element, spring fingers secured by said reflector securing means to said shade element and cooperating with said deformed portions to resiliently retain the lens element in position relative to the reflector, and a lamp socket formed with springing hook means in engagement with said reflector.

4. A lighting fixture having separable lens, reflector, shade and socket elements, comprising a cup-like shade element formed of molded insulating material, circumferentially spaced longitudinal stifiening ribs formed on the interior of said shade element, a pressed metal reflector formed with mounting tabs bent back from the peripheral edge thereof and received against the ends of said ribs, screws threaded into said ribs securing said tabs, separate spring fingers secured against said tabs by References Cited in the file of this patent UNITED STATES PATENTS 2,123,483 Langille July 12, 1938 2,404,476 Early July 23, 1946 2,530,505 Brill Nov. 21, 1950 FOREIGN PATENTS 23,599 France July 19, 1921 (Addition to No. 513,825) 

1. A LIGHTING FIXTURE COMPRISING AN INSULATED SHADE ELEMENT, SECURING MEANS, A REFLECTOR SECURED BY SAID MEANS TO SAID SHADE ELEMENT AND FORMED WITH A PERIPHERAL SLOTTED PORTION, A LENS ELEMENT HAVING PORTIONS RECEIVED IN SAID SLOTTED PORTION, SPRING FINGERS SECURED BY SAID REFLECTOR SECURING MEANS TO SAID SHADE AND COOPERATING WITH SAID SLOTTED PORTION TO RETAIN SAID LENS ELEMENT IN POSITION RELATIVE TO SAID REFLECTOR, AND A LAMP SOCKET FORMED WITH SPRING CLIPS IN REMOVABLE SNAP-IN ENGAGEMENT WITH AND SUPPORTED BY SAID REFLECTOR. 